Universal pneumatic swivel



FIG. 1 is a front elevational view of a universal pneumatic swivel, showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a side elevational view thereof; and

FIG. 6 is an opposite side elevational view thereof. 

The ornamental design for a universal pneumatic swivel, as shown. 